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<!DOCTYPE html>
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<meta charset="utf-8">
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<title>Hello Underground</title>
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<article id="post-DnE日本官网图片下载" class="h-entry article article-type-post" itemprop="blogPost" itemscope itemtype="https://schema.org/BlogPosting">
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<a href="/2025/01/01/DnE%E6%97%A5%E6%9C%AC%E5%AE%98%E7%BD%91%E5%9B%BE%E7%89%87%E4%B8%8B%E8%BD%BD/" class="article-date">
<time class="dt-published" datetime="2025-01-01T21:56:20.000Z" itemprop="datePublished">2025-01-01</time>
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<a class="article-category-link" href="/categories/Tip/">Tip</a>►<a class="article-category-link" href="/categories/Tip/Userscript/">Userscript</a>
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<a class="p-name article-title" href="/2025/01/01/DnE%E6%97%A5%E6%9C%AC%E5%AE%98%E7%BD%91%E5%9B%BE%E7%89%87%E4%B8%8B%E8%BD%BD/">D&E日本官网图片下载</a>
</h1>
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<div class="e-content article-entry" itemprop="articleBody">
<p>注册了 <a href="https://superjunior-dne.jp/" target="_blank" rel="noopener">D&E 日本官网</a>的会员，发现官方发了好多<a href="https://superjunior-dne.jp/group/photo" target="_blank" rel="noopener">高清大图</a>，想下载，但是一个一个找下载地址再下载很麻烦，所以写了个油猴脚本，能直接在页面上一键下载所有图片。</p>
<p class="article-more-link">
<a href="/2025/01/01/DnE%E6%97%A5%E6%9C%AC%E5%AE%98%E7%BD%91%E5%9B%BE%E7%89%87%E4%B8%8B%E8%BD%BD/#more">Read More</a>
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<article id="post-Redis、Valkey性能测试" class="h-entry article article-type-post" itemprop="blogPost" itemscope itemtype="https://schema.org/BlogPosting">
<div class="article-meta">
<a href="/2024/11/29/Redis%E3%80%81Valkey%E6%80%A7%E8%83%BD%E6%B5%8B%E8%AF%95/" class="article-date">
<time class="dt-published" datetime="2024-11-29T17:16:24.000Z" itemprop="datePublished">2024-11-29</time>
</a>
<div class="article-category">
<a class="article-category-link" href="/categories/Develop/">Develop</a>►<a class="article-category-link" href="/categories/Develop/Database/">Database</a>
</div>
</div>
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<h1 itemprop="name">
<a class="p-name article-title" href="/2024/11/29/Redis%E3%80%81Valkey%E6%80%A7%E8%83%BD%E6%B5%8B%E8%AF%95/">Redis、Valkey 性能测试</a>
</h1>
</header>
<div class="e-content article-entry" itemprop="articleBody">
<p>最近看到新闻，<a href="https://www.infoq.cn/article/IEJLgTB9AayJAhOw9dzr?utm_campaign=geek_search&utm_content=geek_search&utm_medium=geek_search&utm_source=geek_search&utm_term=geek_search" target="_blank" rel="noopener">Redis 在试图掌管相关的开源仓库</a>，有很多人都提到了转投
<a href="https://valkey.io/" target="_blank" rel="noopener">Valkey</a> 阵营，查询了一下，网上说 Valkey 有很多优化，特别是多线程方面的，但是搜不到具体的性能测试对比，于是自建了
Redis 和 Valkey 使用 <a href="https://redis.io/docs/latest/operate/oss_and_stack/management/optimization/benchmarks/" target="_blank" rel="noopener">redis-Benchmark</a>
测试了一下。</p>
<p class="article-more-link">
<a href="/2024/11/29/Redis%E3%80%81Valkey%E6%80%A7%E8%83%BD%E6%B5%8B%E8%AF%95/#more">Read More</a>
</p>
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<ul class="article-tag-list" itemprop="keywords"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/Redis/" rel="tag">Redis</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/Valkey/" rel="tag">Valkey</a></li></ul>
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<article id="post-让威联通DDNS检测IP不走代理" class="h-entry article article-type-post" itemprop="blogPost" itemscope itemtype="https://schema.org/BlogPosting">
<div class="article-meta">
<a href="/2023/11/19/%E8%AE%A9%E5%A8%81%E8%81%94%E9%80%9ADDNS%E6%A3%80%E6%B5%8BIP%E4%B8%8D%E8%B5%B0%E4%BB%A3%E7%90%86/" class="article-date">
<time class="dt-published" datetime="2023-11-19T00:21:48.000Z" itemprop="datePublished">2023-11-19</time>
</a>
<div class="article-category">
<a class="article-category-link" href="/categories/Linux/">Linux</a>
</div>
</div>
<div class="article-inner">
<header class="article-header">
<h1 itemprop="name">
<a class="p-name article-title" href="/2023/11/19/%E8%AE%A9%E5%A8%81%E8%81%94%E9%80%9ADDNS%E6%A3%80%E6%B5%8BIP%E4%B8%8D%E8%B5%B0%E4%BB%A3%E7%90%86/">让威联通DDNS检测IP不走代理</a>
</h1>
</header>
<div class="e-content article-entry" itemprop="articleBody">
<p>NAS 设置前置代理后，DDNS 的 IP 会变成代理服务器的 IP 地址，之前参考
<a href="https://sspai.com/post/59612" target="_blank" rel="noopener">NAS 小技巧：一个设置让 NAS 的 DDNS 服务更准确</a> 将 <code>edge.api.myqnapcloud.com</code>
放入直连列表中后，DDNS 一直很稳定。最近 QTS 更新之后发现 VPN 无法连接，DDNS 又指向了代理服务器的 IP。经过抓包后发现，原来是因为获取 NAS IP
的接口地址已经变成了 <code>edge.myqnapcloud.io</code>。</p>
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<article id="post-使用Live-CD安装其他发行版" class="h-entry article article-type-post" itemprop="blogPost" itemscope itemtype="https://schema.org/BlogPosting">
<div class="article-meta">
<a href="/2023/05/03/%E4%BD%BF%E7%94%A8Live-CD%E5%AE%89%E8%A3%85%E5%85%B6%E4%BB%96%E5%8F%91%E8%A1%8C%E7%89%88/" class="article-date">
<time class="dt-published" datetime="2023-05-03T16:57:00.000Z" itemprop="datePublished">2023-05-03</time>
</a>
<div class="article-category">
<a class="article-category-link" href="/categories/Computers-Technology/">Computers & Technology</a>►<a class="article-category-link" href="/categories/Computers-Technology/Linux/">Linux</a>
</div>
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<header class="article-header">
<h1 itemprop="name">
<a class="p-name article-title" href="/2023/05/03/%E4%BD%BF%E7%94%A8Live-CD%E5%AE%89%E8%A3%85%E5%85%B6%E4%BB%96%E5%8F%91%E8%A1%8C%E7%89%88/">使用 Live CD 安装其他发行版</a>
</h1>
</header>
<div class="e-content article-entry" itemprop="articleBody">
<p>之前安装 Linux 都是将 ISO 镜像烧写至 U 盘里，然后通过 U 盘进行安装。这样安装更换系统或者升级版本之后都要重新制作启动 U 盘，现在 U
盘容量都很大，每次只能供一个系统安装镜像使用空间都浪费了。而且每次换镜像都要清除掉 U 盘上所有内容，也很不方便。最近一直在用 Kali everything
版本的 <a href="https://www.kali.org/get-kali/#kali-live" target="_blank" rel="noopener">Live Boot</a> ，工具很全，还能持久化。这次又需要给新硬盘安装系统，想到之前机器本身就是
Ubuntu 的时候，可以直接在 Grub 中添加安装菜单项，就能安装硬盘上的 ISO 文件，完全不需要 U 盘，那通过 Live CD 启动到 Grub
菜单，直接去安装硬盘或者 U 盘上的镜像不就可以一个 U 盘安装多个系统了。经过尝试，发现这种方式完全可行，而且非常灵活。</p>
<p class="article-more-link">
<a href="/2023/05/03/%E4%BD%BF%E7%94%A8Live-CD%E5%AE%89%E8%A3%85%E5%85%B6%E4%BB%96%E5%8F%91%E8%A1%8C%E7%89%88/#more">Read More</a>
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<article id="post-chmod命令4位权限数字的含义" class="h-entry article article-type-post" itemprop="blogPost" itemscope itemtype="https://schema.org/BlogPosting">
<div class="article-meta">
<a href="/2023/04/20/chmod%E5%91%BD%E4%BB%A44%E4%BD%8D%E6%9D%83%E9%99%90%E6%95%B0%E5%AD%97%E7%9A%84%E5%90%AB%E4%B9%89/" class="article-date">
<time class="dt-published" datetime="2023-04-20T17:11:44.000Z" itemprop="datePublished">2023-04-20</time>
</a>
<div class="article-category">
<a class="article-category-link" href="/categories/Computers-Technology/">Computers & Technology</a>►<a class="article-category-link" href="/categories/Computers-Technology/Linux/">Linux</a>
</div>
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<a class="p-name article-title" href="/2023/04/20/chmod%E5%91%BD%E4%BB%A44%E4%BD%8D%E6%9D%83%E9%99%90%E6%95%B0%E5%AD%97%E7%9A%84%E5%90%AB%E4%B9%89/">chmod命令4位权限数字的含义</a>
</h1>
</header>
<div class="e-content article-entry" itemprop="articleBody">
<p>平时授予文件权限都是使用 <code>chmod 777</code> 这样的命令来实现，最近看到了一种 <code>chmod 0777</code> 的写法，效果和 <code>chmod 777</code>
没什么差别，但是这一位又是合法的，很好奇多出来的第一位是什么作用，经过查询 new Bing
和<a href="https://wiki.archlinux.org/title/File_permissions_and_attributes" target="_blank" rel="noopener">文档</a>，发现原来权限的标志位并不仅仅是只有 rwx 那么简单。</p>
<p class="article-more-link">
<a href="/2023/04/20/chmod%E5%91%BD%E4%BB%A44%E4%BD%8D%E6%9D%83%E9%99%90%E6%95%B0%E5%AD%97%E7%9A%84%E5%90%AB%E4%B9%89/#more">Read More</a>
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<article id="post-什么情况下应该使用Java的内部类" class="h-entry article article-type-post" itemprop="blogPost" itemscope itemtype="https://schema.org/BlogPosting">
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<time class="dt-published" datetime="2022-06-24T13:59:28.000Z" itemprop="datePublished">2022-06-24</time>
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<a class="article-category-link" href="/categories/Computers-Technology/">Computers & Technology</a>►<a class="article-category-link" href="/categories/Computers-Technology/Program/">Program</a>
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<a class="p-name article-title" href="/2022/06/24/%E4%BB%80%E4%B9%88%E6%83%85%E5%86%B5%E4%B8%8B%E5%BA%94%E8%AF%A5%E4%BD%BF%E7%94%A8Java%E7%9A%84%E5%86%85%E9%83%A8%E7%B1%BB/">什么情况下应该使用 Java 的内部类</a>
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<p>内部类实际是嵌套类的一种，指非静态嵌套类，另一种是静态嵌套类。最近想用一用，但是在使用了内部类之后
IDEA 总是提示可以改成静态嵌套类，非常好奇这两种类到底应该分别在什么场景下使用。参考了<a href="https://docs.oracle.com/javase/tutorial/java/javaOO/nested.html" target="_blank" rel="noopener">官方文档</a>、
<a href="https://www.baeldung.com/java-nested-classes" target="_blank" rel="noopener">Nested Classes in Java</a> 和一些<a href="https://stackoverflow.com/questions/70324/java-inner-class-and-static-nested-class" target="_blank" rel="noopener">问</a><a href="https://www.zhihu.com/question/28197253" target="_blank" rel="noopener">答</a>，总结了一套暂时能说服自己判断。</p>
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